To ensure reliability, purchase BMW part # 51321939843 Guide Rail Rear Left. It is sometimes referred to as BMW Window Channel. Genuine parts are first-rate in terms of quality and functionality. Manufactured directly by BMW, they undergo rigorous testing and are made from dependable materials to ensure long-lasting durability and dependability. This part fits 1979-1981 BMW 528i, 1975-1978 BMW 530i, 1985-1988 BMW 535i, 1988 BMW M5.
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